| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.servicecomb.edge.core; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import io.vertx.ext.web.handler.PlatformHandler; |
| import org.apache.servicecomb.transport.rest.vertx.RestBodyHandler; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.netflix.config.ConcurrentCompositeConfiguration; |
| import com.netflix.config.DynamicPropertyFactory; |
| |
| import io.vertx.ext.web.Router; |
| import io.vertx.ext.web.RoutingContext; |
| |
| /** |
| * Provide a URL mapping based dispatcher. Users configure witch URL patterns dispatch to a target service. |
| */ |
| public class URLMappedEdgeDispatcher extends AbstractEdgeDispatcher { |
| private static final Logger LOG = LoggerFactory.getLogger(URLMappedEdgeDispatcher.class); |
| |
| public static final String CONFIGURATION_ITEM = "URLMappedConfigurationItem"; |
| |
| private static final String PATTERN_ANY = "/(.*)"; |
| |
| private static final String KEY_ORDER = "servicecomb.http.dispatcher.edge.url.order"; |
| |
| private static final String KEY_ENABLED = "servicecomb.http.dispatcher.edge.url.enabled"; |
| |
| private static final String KEY_PATTERN = "servicecomb.http.dispatcher.edge.url.pattern"; |
| |
| private static final String KEY_MAPPING_PREFIX = "servicecomb.http.dispatcher.edge.url.mappings"; |
| |
| private Map<String, URLMappedConfigurationItem> configurations = new HashMap<>(); |
| |
| public URLMappedEdgeDispatcher() { |
| if (this.enabled()) { |
| loadConfigurations(); |
| } |
| } |
| |
| @Override |
| public int getOrder() { |
| return DynamicPropertyFactory.getInstance().getIntProperty(KEY_ORDER, 30_000).get(); |
| } |
| |
| @Override |
| public boolean enabled() { |
| return DynamicPropertyFactory.getInstance().getBooleanProperty(KEY_ENABLED, false).get(); |
| } |
| |
| @Override |
| public void init(Router router) { |
| // cookies handler are enabled by default start from 3.8.3 |
| String pattern = DynamicPropertyFactory.getInstance().getStringProperty(KEY_PATTERN, PATTERN_ANY).get(); |
| router.routeWithRegex(pattern).failureHandler(this::onFailure) |
| .handler((PlatformHandler) URLMappedEdgeDispatcher.this::preCheck) |
| .handler(createBodyHandler()) |
| .handler(this::onRequest); |
| } |
| |
| private void loadConfigurations() { |
| ConcurrentCompositeConfiguration config = (ConcurrentCompositeConfiguration) DynamicPropertyFactory |
| .getBackingConfigurationSource(); |
| configurations = URLMappedConfigurationLoader.loadConfigurations(config, KEY_MAPPING_PREFIX); |
| config.addConfigurationListener(event -> { |
| if (event.getPropertyName().startsWith(KEY_MAPPING_PREFIX)) { |
| LOG.info("Map rule have been changed. Reload configurations. Event=" + event.getType()); |
| configurations = URLMappedConfigurationLoader.loadConfigurations(config, KEY_MAPPING_PREFIX); |
| } |
| }); |
| } |
| |
| protected void preCheck(RoutingContext context) { |
| URLMappedConfigurationItem configurationItem = findConfigurationItem(context.request().path()); |
| if (configurationItem == null) { |
| // by pass body handler flag |
| context.put(RestBodyHandler.BYPASS_BODY_HANDLER, Boolean.TRUE); |
| context.next(); |
| return; |
| } |
| context.put(CONFIGURATION_ITEM, configurationItem); |
| context.next(); |
| } |
| |
| protected void onRequest(RoutingContext context) { |
| Boolean bypass = context.get(RestBodyHandler.BYPASS_BODY_HANDLER); |
| if (Boolean.TRUE.equals(bypass)) { |
| // clear flag |
| context.put(RestBodyHandler.BYPASS_BODY_HANDLER, Boolean.FALSE); |
| context.next(); |
| return; |
| } |
| |
| URLMappedConfigurationItem configurationItem = context.get(CONFIGURATION_ITEM); |
| |
| String path = Utils.findActualPath(context.request().path(), configurationItem.getPrefixSegmentCount()); |
| |
| EdgeInvocation edgeInvocation = createEdgeInvocation(); |
| if (configurationItem.getVersionRule() != null) { |
| edgeInvocation.setVersionRule(configurationItem.getVersionRule()); |
| } |
| edgeInvocation.init(configurationItem.getMicroserviceName(), context, path, httpServerFilters); |
| edgeInvocation.edgeInvoke(); |
| } |
| |
| private URLMappedConfigurationItem findConfigurationItem(String path) { |
| for (URLMappedConfigurationItem item : configurations.values()) { |
| if (item.getPattern().matcher(path).matches()) { |
| return item; |
| } |
| } |
| return null; |
| } |
| } |